Amplification Properties of Raman Fiber Amplifiers for Narrowband Single Frequency Sources

We study the intensity and phase noise as well as the spectral broadening of narrowband single-frequency fiber laser emission after amplification in a polarization-maintaining Raman fiber amplifier. The optical properties of a 10-W 1266-nm single-frequency source, based on a single-frequency low-noise fiber laser amplified in a Raman fiber amplifier, will be presented.